Kroger is recalling spinach sold at grocery stores in 15 states due to possible Listeria contamination. The Fresh Selections Tender Spinach was sold in 10-ounze packages and had a “best if used by” date of Sept. 16. The grocer said Wednesday that if customers did buy the recalled product, they should return it to stores for a full refund or replacement. Listeria can lead to severe illness for women who are pregnant or people who have a weakened immune system.